US3395532A - Time piece hairspring end fastening means - Google Patents

Time piece hairspring end fastening means Download PDF

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Publication number
US3395532A
US3395532A US578851A US57885166A US3395532A US 3395532 A US3395532 A US 3395532A US 578851 A US578851 A US 578851A US 57885166 A US57885166 A US 57885166A US 3395532 A US3395532 A US 3395532A
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US
United States
Prior art keywords
spring
boss
bosses
hairspring
outer end
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US578851A
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English (en)
Inventor
Schneider Jean-Claude
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
D HORLOGERIE CHS TISSOTET FILS
Fabrique D'horlogerie Chs Tissotet Fils S A
Original Assignee
D HORLOGERIE CHS TISSOTET FILS
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Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/325—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring in a fixed position, e.g. using a block
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/04—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat
    • G04B18/06—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat by setting the collet or the stud of a hairspring

Definitions

  • a hairspring is a fine blade spring element wound in the form of a flat ribbon or uniplanar coil around the axis of the balance wheel of the movement, the inner end of the coiled blade being attached to an element on the balance wheel axis and the outer blade end being attached to a rigid member, for example, a part of the stud holder.
  • an object of this invention to provide an attachment means for the outer end of a hairspring, whereby the attachment of said outer end may be effected easily, effectively, and without disturbing the flatness of the spring ribbon.
  • FIGURE l is a plan view of a first embodiment
  • FIGURE 2 is a plan view of a second embodiment
  • FIGURE 3 is a partial sectional view taken along the line III-III of FIGURE 1;
  • FIGURE 4 is a partial sectional view along the line IVIV of FIGURE 1;
  • FIGURES 5 and 6 are sectional views corresponding to FIGURES 3 and 4 but showing a modification relative thereto;
  • FIGURE 7 is a sectional view corresponding to FIG- URES 4 and 6 but showing a modification relative thereto.
  • FIGURES l and 2 a portion of a watch movement is shown wherein a bridge 5 serves as a support for stud holder 3 and regulator 6.
  • Bridge 5 includes an opening 4 through which passes the balance wheel shaft 1.
  • the stud holder 3 includes a laterally extending arm 7, 7' upon which are mounted the respective attachment elements for the hairspring outer end portion.
  • bosses 8, 9, 10, and 11 rigidly extend axially, or perpendicularly, from the flat surface 15 of arm 7, said fiat surface 15 being perpendicular to the axis of shaft 1. Further, the axes of bosses 8 to 11 are substantially aligned on a straight line, however, the outer surfaces of said bosses define bearing surfaces for spring 2 along a sinusoidal path. As is evident from FIGURES 3 and 4, the respective bosses 8 to 11 are integral or rigid with arm 7.
  • Boss 8 serves as a guide for curving the spring as it emerges from between elements 13 and 14 towards the inner face of boss 9. Elements 13 and 14 on regulator 6 serve to determine the effective length of the hairspring 2. It should be understood that the spring bears elastically against the respective axial (cylindrical) surfaces of bosses 8 to 11 so that it is continually flexed between the respective b osses. It should be noted, however, that the flexing forces are all in a radial direction, that is, perpendicular to the axis about Which spring 2 is Wound in the form of a flat ribbon.
  • the stud holder 3 is a one-piece injection-molded plastic material member, which, as is seen in FIGURE 4, includes a lip 12 radially extending from the axial surface of boss 11.
  • This lip is conveniently formed by providing a cylindrical core member in the injection mold in which the stud holder is molded, said core member producing a cylindrical opening 16 in arm 7, which opening overlaps the circumference of boss 11 and thereby results in a boss 11 which includes an inwardly concave notch portion 11'.
  • the core in the mold does not extend the full axial length of boss 11 so that the free end of boss 11 retains its full circle configuration and that portion of the circle which is axially adjacent notch 11 constitutes lip 12.
  • Spring 2 rests axially against lip 12 (FIGURE 4) so that lip 12 and regulator 6 both form an axial support or guide means for the end portion of spring 2.
  • lip 12 and key 14 restrain the spring end portion against any tendency for it to slip in an axial direction along the boss surfaces towards the free ends of said boss members.
  • the stud holder arm 22 (corresponding to arm 7) includes three (instead of four) bosses 23, 24, 25 extending perpendicularly from flat face 30.
  • the first boss 23 is elongated rather than circular in cross section and has a flat external or outer radial face.
  • the side or axial face of boss 23 defines a series of curvilinear and flat generatrices perpendicular to said face 30.
  • Second boss 24 of circular form is located opposite to the end of a flat portion of the axial face of boss 23 and is spaced 3 therefrom a distance equal to the thickness of blade spring 27 (corresponding to spring 2).
  • the regulator 6 includes a single cylindrical pin 29 instead of the pin 13 and key 14 of FIGURE 1.
  • the end portion of spring 27, therefore, bears against the inner axial side of pin 29 (which serves in this instance as a guide boss analogous to boss 8 in FIGURE 1) and is then curved to pass against the inner curved side of boss 23 where spring 27 is bent at 31 to extend between bosses 23 and 24.
  • Spring 27 is then bent at 32 against the boss 24 and then bears against the inner side of cylindrical boss 25.
  • Boss 25 and hole 26 are analogous to boss 11 and hole 16 in FIGURE 1 so that boss 25 also includes a lip analogous to lip 12.
  • the three bosses 23, 24, and 25, therefore, determine a sinusoidal path for spring 27 whereby said spring is radially flexed in opposite directions between bosses 23 and 25 on one side and boss 24 on the other.
  • FIGURES and 6 illustrate the details of a stud holder which is metallic instead of being of plastic material.
  • the stud holder arm 17 (corresponding to either arm 7 or 30) is a metal plate and bosses 19 and 20 (corresponding to either bosses 10 and 11 or 24 and 25) are integrally formed in a plastic base 18 which in turn is attached to metal plate 17 by means of protrusion 21 which is force-fitted into an opening in said metal plate.
  • FIGURE 7 illustrates a variation over FIGURES 4 and 6 in the lip means 12.
  • the inner axial face of the last boss (corresponding the bosses 11 and 25 is outwardly inclined at 33 thereby forming an inclined ledge.
  • Spring 2 or 27 will, therefore, be elastically wedged between said inclined face 33 and the fiat face 34 of the stud holder arm (7 or
  • the aforedescribed embodiments and modifications thereto provide a hairspring attachment means which assures that the spring will not be subjected to either torsional or buckling forces. No forces act upon the spring in an axial direction, that is, in a direction parallel to the spring axis. The only forces acting upon the spring are perpendicular to the spring axis and these forces do not tend to disturb the fiat, uni-planar disposition of the spring turns.
  • the boss arrangement described can also be used in a watch piece in which the spring extends above the balance wheel.
  • the boss support and the bosses can be made integral with the cock. They can also be mounted on a movable stud holder which pivots around the cock end piece and is located above or below the regulator.
  • a time piece movement comprising a hairspring wound in the form of a ribbon about an axis, an attachment means securing the free outer end of said spring, said means comprising: a plurality of bearing surfaces extending parallel to said axis, said surfaces being arranged so as to define a substantially sinusoidal path, said spring outer end extending along said path with said spring outer end being flexibly bent in conformity with said surfaces.
  • said means comprising at least three of said surfaces, one of said surfaces being disposed on one axial side of said spring and the other two being disposed on the other side of said spring.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Adornments (AREA)
US578851A 1965-09-24 1966-09-12 Time piece hairspring end fastening means Expired - Lifetime US3395532A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1324465A CH447042A (fr) 1965-09-24 1965-09-24 Dispositif de fixation de l'extrémité extérieure d'un spiral réglant de pièce d'horlogerie

Publications (1)

Publication Number Publication Date
US3395532A true US3395532A (en) 1968-08-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
US578851A Expired - Lifetime US3395532A (en) 1965-09-24 1966-09-12 Time piece hairspring end fastening means

Country Status (4)

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US (1) US3395532A (fr)
CH (1) CH447042A (fr)
DE (1) DE1523857B2 (fr)
GB (1) GB1121204A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956881A (en) * 1974-06-25 1976-05-18 Eta A.G. Ebauches-Fabrik Hairspring and collet assembly for timepieces
US5052760A (en) * 1988-05-20 1991-10-01 Bendix Italia S.P.A. Hydraulic proportioning valve
US6612734B1 (en) * 1999-07-29 2003-09-02 Seiko Instruments Inc. Mechanical timepiece with stud adjustment mechanism
US8961003B2 (en) 2013-03-19 2015-02-24 Nivarox-Far S.A. Timepiece balance spring
US9122246B2 (en) * 2013-12-20 2015-09-01 Blancpain Sa Mechanism for securing a balance spring stud to a balance bridge and sprung balance regulating device including such a mechanism

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH707814A2 (fr) * 2013-03-19 2014-09-30 Nivarox Sa Mécanisme de réglage de spiral d'horlogerie.
EP3543796A1 (fr) * 2018-03-21 2019-09-25 Nivarox-FAR S.A. Procede de fabrication d'un spiral en silicium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US498209A (en) * 1893-05-23 Hair-spring stud for watches
US772106A (en) * 1904-05-13 1904-10-11 Richard Lange Balance-spring stud.
CH261671A (fr) * 1947-08-23 1949-05-31 Montres Era S A Dispositif régulateur à spiral plat pour pièces d'horlogerie.
FR1145347A (fr) * 1956-01-13 1957-10-24 Perfectionnements aux supports d'attaches du spiral dans les mouvements d'horlogerie
US3046725A (en) * 1958-10-29 1962-07-31 Parechoc Sa Hairspring adjustment device for a timepiece

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US498209A (en) * 1893-05-23 Hair-spring stud for watches
US772106A (en) * 1904-05-13 1904-10-11 Richard Lange Balance-spring stud.
CH261671A (fr) * 1947-08-23 1949-05-31 Montres Era S A Dispositif régulateur à spiral plat pour pièces d'horlogerie.
FR1145347A (fr) * 1956-01-13 1957-10-24 Perfectionnements aux supports d'attaches du spiral dans les mouvements d'horlogerie
US3046725A (en) * 1958-10-29 1962-07-31 Parechoc Sa Hairspring adjustment device for a timepiece

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956881A (en) * 1974-06-25 1976-05-18 Eta A.G. Ebauches-Fabrik Hairspring and collet assembly for timepieces
US5052760A (en) * 1988-05-20 1991-10-01 Bendix Italia S.P.A. Hydraulic proportioning valve
US6612734B1 (en) * 1999-07-29 2003-09-02 Seiko Instruments Inc. Mechanical timepiece with stud adjustment mechanism
US8961003B2 (en) 2013-03-19 2015-02-24 Nivarox-Far S.A. Timepiece balance spring
US9122246B2 (en) * 2013-12-20 2015-09-01 Blancpain Sa Mechanism for securing a balance spring stud to a balance bridge and sprung balance regulating device including such a mechanism

Also Published As

Publication number Publication date
DE1523857B2 (de) 1971-07-08
CH1324465A4 (fr) 1967-02-28
GB1121204A (en) 1968-07-24
CH447042A (fr) 1968-03-15
DE1523857A1 (de) 1969-08-14

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